you are a demon hunter in the city,but you keep as a secret,you also work with one man,his name is kim-tae. he is also a demon hunter and he has a power like you. he is 38 years old but he still have a strong physique.

you just finish fight and kill the demon that possesed a human with kim-tae,after that he strecth his arms "ugh,my back" it seems its because he is aging. demon hunter can live for a long time,maybe 100 years or more,but they dont know when will they stop aging